NDLI: Invasive litter, not an invasive insectivore, determines invertebrate communities in Hawaiian forests

Content Provider	Springer Nature Link
Author	Tuttle, Nathania C. Beard, Karen H. Pitt, William C.
Copyright Year	2008
Abstract	In Hawaii, invasive plants have the ability to alter litter-based food chains because they often have litter traits that differ from native species. Additionally, abundant invasive predators, especially those representing new trophic levels, can reduce prey. The relative importance of these two processes on the litter invertebrate community in Hawaii is important, because they could affect the large number of endemic and endangered invertebrates. We determined the relative importance of litter resources, represented by leaf litter of two trees, an invasive nitrogen-fixer, Falcataria moluccana, and a native tree, Metrosideros polymorpha, and predation of an invasive terrestrial frog, Eleutherodactylus coqui, on leaf litter invertebrate abundance and composition. Principle component analysis revealed that F. moluccana litter creates an invertebrate community that greatly differs from that found in M. polymorpha litter. We found that F. moluccana increased the abundance of non-native fragmenters (Amphipoda and Isopoda) by 400% and non-native predaceous ants (Hymenoptera: Formicidae) by 200%. E. coqui had less effect on the litter invertebrate community; it reduced microbivores by 40% in F. moluccana and non-native ants by 30% across litter types. E. coqui stomach contents were similar in abundance and composition in both litter treatments, despite dramatic differences in the invertebrate community. Additionally, our results suggest that invertebrate community differences between litter types did not cascade to influence E. coqui growth or survivorship. In conclusion, it appears that an invasive nitrogen-fixing tree species has a greater influence on litter invertebrate community abundance and composition than the invasive predator, E. coqui.
Starting Page	845
Ending Page	855
Page Count	11
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	11
Issue Number	4
e-ISSN	15731464
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-06-21
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biological invasions Bottom-up control Eleutherodactylus coqui Leaf litter Top-down control Trophic cascade Developmental Biology Ecology Plant Sciences Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics

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Invasive Litter, Not an Invasive Insectivore, Determines Invertebrate Communities in Hawaiian Forests

Invasive litter, not an invasive insectivore, determines invertebrate communities in Hawaiian forests

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